Sand-blast device.



W. MA GLEOD & HEXT. SAND' BLAST DEVICE.

APPLICATION FILEDIMAY 17, 1909.

1,026,688. Patented May 21 1912.

muevxqfub 'UN TED'sTATEs PATENT orFIoE.

- WALTER MACLEOJIJ, or roar THOMAS, KENTUCKY, AND WILLIAM HEXT, or

CINCINNATI, onro.

SAND-BLAST rnvron.

Specification of Letters Patent.

Patented May 21, 1912.

' Application filed May 17, 1909. Serial N 0. 496,605.

Be it known that we, \VALTER MACLEOD and WILLIAM Hnx'r, citizens of the United i. State of Ohio, respectively, have invented certain new and useful Improvements in.

States of America, and residents of Fort Thomas, county of Campbell, State of Kentucky, and Cincinnati, county. of Hamilton,

" Sand-Blast Devices, of which the'following is a specification.

Our lnventlon relates to sand blast de-, vices, wherein sand 13 taken up from a col-.

lector by suction created by compressed air, and is ejected by the compressed air against the object which is to be sanded. J

The object ofour invention is a sand blast device wherein the sand, when taken up at the collector is kept together and is carried along through the hose, or conduit, in 'a condensed stream, and is ejected from the nozzle in a central condensed jet, which is surrounded by a jacket of air,'so as to prevent the nozzles being out by the sand.

Referring to the drawings, which form part of this specification, Figure 1 is a side elevation of a sand blast device embodying our invention, the sand reservoir being' shown upon a reduced scale, and the hose which connects the collector to the nozzle being broken out, and the ends being brought together to economize space. Fig. 2 is a detail plan view of the collector. Fig. 3 is a sectional view thereof, taken upon line 3.-3 'of Fig. 2. Fig. 4 is a view partly in elevation and partly in central vertical section of the nozzle.

Referring to the drawings: The sand res-- ervoir, A, and its supporting frame, a, areof ordinary construction. The collector to leave an air slot, B, between it and the front edge of the pan. Cover, 6, has an annular collar, 6 which is adapted to be secure'd-by a set screw, a, to the discharge end of, of the sand reservoir. Both the cover, I), and the pan, 6, have lateral'lugs, I

5 which receive bolts for securing the pan zle, D, which fits into an air chamber, E.'

In axial alinement with the nozzle, D, is a sand delivery pipe, F, whichis connected by a hose, G, to a pipe, g, which is held by a thumb-screw, g, in the neck of the sand collector. Below the sand pipe, F, chamber,E, has a collar, 6, into which an air pipe, H, leads. The opening of the pipe, H, is controlled by a cock, it. The nozzle, D, is tapered at, d, and into the tapered portion the sand pipe, F, projects, extending pasttheair port, 6. The air chamber, E, is made of a shape such as to leave an air space between the pipe, F, and the walls of the chamber, E.

The operation of the device is as follows: Sand is deposited from the pipe, a leading from the reservoir, A, centrally upon the bottom of the pan, b. When the cock, h, is

opened, compressed air rushes into the air chamber, E, and is ejected thence outward through the nozzle, D. This forcible exit of the air through the nozzle creates a vacuum in the sand pipe, F, and creates a suction through the hose, G, which draws the air in and carries the sand along the center of the pipe, G, so that the sand is ejected from the sand-pipe, F, in a central jet, as indicated in Fig. 4. The compressed air from the pipe, H, is ejected from the air chamber, E, in the form of a j acket,'which surroundsthe jet of sand, and prevents the sands cutting the nozzle, D.

What we claim is:

1. 'In a sand blast device the combination of a sand collector consisting of a pan and a cover for the pan, both of which have reduced delivery neck, the pan projecting beyond the front edge of the cover and forming thereby an air inlet, the cover have vided in said cover between said air inlet ing an opening adapted to admit sand cenand sald sand delivery port for admitting 10 (rally to the bbttom of the pan. sand to said collector.

2. In a sand blast device, a sand collector, 7 WALTER MACLEOD. 5 consisting of a pan and a cover for the pan, WILLIAM HEXT.

the pan projecting beyond the front edge of Witnesses: v the cover, and thereby forming an air inlet- WALTER F. MURRAY,

port, a sand delivery port, and-a port pr0- C. H. BARTH. 

